\begin{tikzpicture}
    \tkzDefPoints{0/0/A, 3.5/0/D, 1.75/1/O}
    \tkzDefPointOnLine[pos=1.4](A,O)  \tkzGetPoint{B}
    \tkzDefPointOnLine[pos=1.4](D,O)  \tkzGetPoint{C}

    \tkzDrawPolygon(A,O,C)
    \tkzDrawPolygon(B,O,D)
    \tkzLabelPoints[above](C,B)
    \tkzLabelPoints[below](A,O,D)
\end{tikzpicture}

